Saw set



Jan. 10, 1950 K. BLACKMON SAW SET Filed Oct. 16, 1947 2 Shets-Sheet 1 Fig. l. 38

Inventor Kennel/1 B/ackmon K. BLACKMON Jan. 10, 1950 SAW SET 2Sheets-Sheet 2 Filed' Oct. 1:6, 194

Fig.3.

Patented Jan. 10, 1950 r L ITEB PATENT G' FFI CEE iSAW SET KennethBlakmon, HinsdztlegN. Y.

.Application-flotobcr r16, 19432,.Seriazl Nn. 280,146

2 "Claims. (0116- 63) Thisinvention relates to a saw set and 'hasiforwhen in use 'from binding against the walls of the kerf made in apieceof'wood by the saw.

fAnother 'object'is toholdthe saw blade against buckling during thebending of .a tooth. kfurther'objectisito assure the bending of thesuccessive teethat the proper angle so that the set "of the saw willbeuniform throughout its .entire length.

The above and other objectsmay' be attained'hy employing-this inventionwhich embodies among its featuresa table, saw supportingmeans carried bythe -table, an anvil mountedon the table for verticaladjustment inspaced relation'to the saw supporting means, a plunger mounted above theanvil for vertical movement toward and away from said anvil and handactu-atedlmeans'to force the plunger downwardly against a .saw blade 7mounted on the .saw supporting means and bearing on the anvil.

Other features include means bearing on the sawbla'de adjacent.theplunger to hold the blade fro buckling whenthe plunger 'is moveddownwardlyagainsfithe:bl-ade, an inclined face on the anvil, acoopfirating'lnclined face on theplunger, and means 'to rotate theplunger about its longitudinal axis so that the inclination of the facethereof maybevarie'd relati-ve'to the inclined face o'fthe plunger.

Inthe drawings:

Figure 1 is .a-side view vofassawset embodying the features of thisinvention;

Figure 12-is 'a top plan View or *thesawse't illustrated in Figure 1;

Figure 3is'alongitudinalsectionalaliew through the saw set;

Figure 4 is a perspectiveview of the saw supporting-member;

Figure 5 is a perspective viewo'fthe anvil; and

Figure G -is aperspective -viewof a guide block foraconventional-hand-saw.

Referring *to the drawings in "detail this improved sawset-comprisesabase 1 lll provi'ded with a -longitudin'al slot I l andcarrying adjacent *one endapad f2-through-which-a bore F3 extendsperpendicularly to -the top face of the base T0 for -a purpose tobe morefully hereinafter described. Formed in the base In near the bore I3 isan internally screw threaded opening M a purpose of which will morefully hereinafter appear, and formed along the upper edge of the slot IIis an elongated recess l5 while the opposite edges of the slot II areformed with similar recesses I6.

" tdhermorelful-ly hereinafterexplained.

a seated on the pad .[2 .is .a Vertically extending post I! which ishe1d,.in position by means 91a screw 4.8 entered through the opening 1.3and into the post, .and iormed on the post .is Jan overhang,-ingnpml'ection L9 whichextends toward theislot 1'5 and is formedwithvavertically extending opening 21] in which .a .suitable (guide .sleelte2] is pressed. 'iIfhe upper end .01" the .opening'zu-opens into .anenlarged chamber '22, and the upper .end olgthespos't I'IiisQbifurcatedasaat Z3 .forapurpose Mountediror longitudinal sliding movement in thesleeve ,2"! Zis a plunger '24 "provided near its upper ,endwithanouts'tanding annular flange'li, and resting .on the;u p per end ofthe sleeve 21 and against the under sidelofthejflange'zii is acompression .coiLspring Z6 which serves to yieldably hold'the plungeriinelevatedposition. Extending radially from the plunger 2'4 adjacent "itsupper end is a handslever 21 by which the plunger may berotated".aboutits longitudinal axis for a purpose to be more fully hereinafterexplained. Form'e'd' on the lower :end of the plunger "is an angularface 2,8 which serves to engage a "saw tooth to bend it as theplunger'tis moveddownwariily against the 'e'fiort'of the spring 25..fExteniiingout-wardly toward the slotted end 01' thefbase Illifromthe'extens'ion l9 near'its lower end is mam 29 which is provided with avertically extending "bore 30 which "lies parallel to the opening '20and extending through the arm 29 is *an internally-screw threaded bore21 for the reception 'ofthethreadeds'hank of a set screw"'32 Mouritedfor oscillation about the horizontal axis oT-asupporting pin 3'3 whichprojectsftrans} versely betweenthe arms of the bifurcaited-end 2-3 ofthecolumn VI *is'a camor eccentrictl'carrying an outwardly -extending"operating *arm '35; This ecceritric ml is so 'loc-a'ted in thebifurcation 23 that the periphery or eccentric surface thereof contactsthe upperendhfthe plunger 24-so that as the lever is moved downwardly,the plunger 2fl' will be depressed against the e'fiort o'f thesprine 2B.Pivotally mounteliwa't 36in thebifurcationfi in spaced relation thepivot 8 3 is "a 'hand lever 31 to which 'is pivoted intermediate itsends *as at 38 some erfd'of a link 39. "Theopposite end *of the lirrk'39' is p ivdted'as amt to the arm 35 of the eccentric flso' thatasthel-h'andlever 31 is-moved about its pivot, the eccentric will he'moved. in unison therewith.

Entered into the lower end of the internally screw threaded opening I4in the base I0 is an adjusting screw 4|, and seated on the upper end ofthe adjusting screw and fitted into the upper end of the opening I4 isthe stem 42 of an anvil 43. This anvil is provided with an inclinedupper face 44 which is adapted to cooperate with the inclined face 28 onthe plunger 24 in bending a saw tooth to the proper angle. A suitableset screw 45 enters the base II] at an angle from the top surfacethereof and impinges against the shank 42 of the anvil 43 in order tolock the anvil in the desired position. after it has been properlyadjusted by turning. the adjusting screw 4|.

When straight bladed saws are to be set, a

of the inclined face 28 thereof, to the inclined plate 46 is seated onthe base In in the grooves;

I5, and this plate is provided with an opening 41 for the reception of aclamping bolt which is adapted to extend downwardly through the slot andfitted with a nut which engages the underside of the base l inordertdclamp' the plate 1 46 in the desired position on the base. .Avertically extending stop 48 extends perpendicularly from the plate 46and serves to engage the back edgeof a sawblade in order to hold theteeth in proper position over the anvil 42.

When circular saws are to be set a clamp plate 494s seated over the slotI in the grooves l and a'jfsim'ilar clamp plate5il engages the underside of the base l0 and seats in the grooves l6. A clamping bolt 5|extends through theplat'es and isne duipped on its lower end with asuitable nut. This bolt 50 is adapted to extendthrough the usual arborreceiving opening of a conventional circular saw and a washer 52 isinterposed betweenthe saw and the head of the bolt 5| in order securelyto clamp the circular saw blade in place.

Obviously by loosening the bolt 5| the 'saw may beadjusted tobring theperipheral teeth thereof into proper position over'the anvil so thatwhen the plunger 241s moved downwardly the tooth with which it contactswill be bent to the desired angle. r

In order toprevent the saw blade from buckling'during the exertion ofpressure on a tooth thereof a suitable pressure member designatedgenerally 53 is employed. This said pressure member comprises a shank 54which is adapted to be entered into the opening 30 of the arm 29 andclamped therein by the set screw. 32. The lower end of the-shank isbifurcated as at 55 and mounted for rotation in the bifurcation is apressure roller 56 which as illustrated in Fig ures Land 3 is adapted tobear-againstasaw blade near the tooth upon which the pressure isbeingappl ed. The degree of pressureexerted by theroller-56 on the sawblade may be governed by looseningthe set screw 32 and moving the shank5.4 towardor away'from the saw blade and again" tightening the set screwso-that any tendency'of the saw blade to buckle under the bending of atooth thereofwill be counteracted by the roller 56.- V 5 In use itwillbeunderstoodthat when a circular; saw is to be set, it is clampedinto place on the-base beneaththe washer 52 and so ad-. justedthattheteeth on the periphery thereof will overlie the anvil 42 substantiallyas illustrated in'the drawings. Upon exerting downward pressure on thehand lever 31', the plunger 241wi11 be lowered, thus bringing itsinclined face 28, against the upper side of a saw tooth of the sawbeing. set and bending it downwardly against-the face 44 of the anvil 42may be varied to suit various different requirements.

While in the foregoing there has been shown and described the preferredembodiment of this invention it is to be understood that minor changesin the details of construction, combination and arrangement of parts maybe resorted to without departing'from the spirit and scope of theinvention as claimed.

Having described 7 the invention, what is claimed as new is: a g l. Asaw set comprising a table, an anvil mounted near one end of the tablefor vertical adjustment, saw supporting means .mounted on the table foradjustment toward .or away from the anvil, said anvil having an inclinedfaceover which projects a' saw tooth' carried by a saw blade mounted onthe-saw supporting means, a

post carried at said one end of said- .table, a plunger mounted on saidpost above. the anvil for vertical movement toward and away from thetable} resilient means normally urging said plunger away from saidanvil, an inclined face on thelower end of the plunger for engagementwith the saw tooth that projects over the anvil, a hand lever carried bysaid plunger for. rotating the same about its longitudinal axisto movethe inclinedface thereon into various angular positionsrelative to theinclined face. on the anvil, a presser roller mounted for verticaladjustment on said post adjacent said plunger, and means to advance theplunger toward the. anvil to bend the projecting saw tooth relative tothe saw blade.

2. 'Ihe" combination of claim l wherein said means includes a leverpivoted to said post above said plunger, said leverincluding, a .camadapted to engage the upper-end of. said plunger. and de.-.

.pressthe same. against action of said resilient" means upon a downwardmovement of. said lever.

KENNETH BLACKMON. REFERENCES orrnn The "following references are ofrecord in the file of this patent:

' UNITED STATES PATENTS V v -Date Hively Aug. 19, 1947

